CN106602900A - High-low-side bootstrapped drive control method and apparatus - Google Patents
High-low-side bootstrapped drive control method and apparatus Download PDFInfo
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- CN106602900A CN106602900A CN201510678967.XA CN201510678967A CN106602900A CN 106602900 A CN106602900 A CN 106602900A CN 201510678967 A CN201510678967 A CN 201510678967A CN 106602900 A CN106602900 A CN 106602900A
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- pipe
- low side
- switch periods
- flash
- side pipe
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a high-low-side bootstrapped drive control method and apparatus. The method comprises: circuit characteristics of circuits where a high-side tube and a low-side tube are located are detected; and when the circuit characteristics meet a predetermined condition, the high-side tube and the low-side tube are controlled to output specific drive waveforms according to a preset strategies. The preset strategies include: the high-side tube is configured to work in a closed-loop state and the low-side tube is configured to work in an open-loop state; within a switching period, the low-side tube is in conduction at a time later than a starting time of the switching period by a first predetermined time length and is turned off before an on time of the high-side tube; or the low-side tube is turned on after an off time of the high-side tube and is turned off at a time earlier than an end time of the switching period by a second predetermined time length, wherein the switching periods of the high-side tube and the low-side tube are same and are synchronized.
Description
Technical field
The present invention relates to field of power electronics, more particularly to a kind of high-low side bootstrapping drive control method and dress
Put.
Background technology
With industrial development, green energy conservation cry is day by day raised.Applied power electronics are in the base of industrial equipment
Plinth component, such as power supply, frequency converter product, it is most important to the energy consumption of main equipment；Its conversion efficiency,
Directly affects the energy consumption grade of main equipment.Drastically accelerate in renewal of the equipment iteration, space requirement is increasingly carried
High today, power electronic product needs the requirement in the epoch of complying with, towards high efficiency, high power density,
Digital development；Especially in recent years, with the appearance of novel semi-conductor switching device, power electronics will enter
Enter next new era.
In Power Electronic Technique, high-low side is driven to conventional application scenarios, and type of drive is frequently with light
Coupling drives, transformator drives and driving of booting.Optocoupler drives and is typically employed in isolation place, must increase
Extra auxiliary circuit, isolates power supply, and circuit is relative complex, high cost, it is difficult to integrated, takes empty
Between it is big, be unfavorable for modularized design.Transformator drives and is typically used in high-frequency drive isolation place, transformation
Device drives usually needs more complicated auxiliary circuit, high cost, and volume is big, is typically employed in high-power field
Institute, is not suitable for modularized design yet.Bootstrapping drives and typically adopt special IC (IC, Integrated
Circuit) integrated, peripheral component is few, it is easy to which integrated, modularized design, circuit is relatively easy, into
This is low, has a wide range of applications in field of power electronics, and bootstrapping drives and typically adopts complementary working mode,
To maintain flash bootstrap capacitor voltage.
High-low side switching tube drives, such as bridge circuit, totem quite varied in field of switch power application
Post Active PFC (PFC, Power Factor Correction) circuit, BUCK synchronous rectifications electricity
Road, BOOST circuit of synchronous rectification, for above topology structure, high-low side switching tube type of drive one
As driven using bootstrapping, i.e., when low side pipe turn on, by low side pipe to charging bootstrap capacitor, with maintenance
The voltage of bootstrap capacitor, this requires flash pipe and low side pipe is operated in complement mode, but in some topologys
In structure, flash pipe and low side pipe should not be operated in complement mode, further, since the limit in cost and space
System, also can not be driven using optocoupler or transformator drives.
Fig. 1 is the schematic diagram of totem pole non-bridge PFC circuits in prior art.As shown in figure 1, even
In the totem pole pfc circuit of continuous conduction mode (CCM, Continuous Conduction Mode),
Drive for flash pipe Q1, low side pipe Q2, such as driven using the bootstrapping of complement mode, in underloading
Circuit would operate in discontinuous conduction mode (DCM, Discontinuous Conduction Mode), electricity
To after zero, inductive current is counter to be filled for inducing current afterflow；Common rectification bridge tube (the commutation diode D1 of low band arm
Or D2) because bearing back-pressure, there is reverse recovery current；Common rectifier bridge at a slow speed is operated in HF switch
State, produces very big anti-phase loss and interference.
Next the course of work of totem pole non-bridge PFC circuits is illustrated by taking positive input as an example, ripple is driven
Shape is with inductive current (IL) waveform as shown in Fig. 2 being broadly divided into the three below stage：
First stage S001：Supervisor (low side pipe Q2) is open-minded, auxiliary pipe (flash pipe Q1) shut-off,
Inductive energy storage, current direction is as shown in figure 3, linearly increasing；
Second stage S002：Supervisor (low side pipe Q2) shut-off, auxiliary pipe (flash pipe Q1) is open-minded,
Inductance releases energy, and current direction is as shown in figure 4, linear reduced；
Phase III S003：Inductive current declines after zero, and rectification diode bears back-pressure, because it is deposited
In Reverse recovery, inductive current is reversely as shown in Figure 5.
In addition, totem pole non-bridge PFC circuits are according to single tube conducting bootstrapping type of drive, in input electricity
When pressing reverse, under underloading, because inductive current is less, each switch periods cannot boot to flash pipe
The sufficient enough electricity of electric capacity, will be unable to maintain bootstrap capacitor voltage, cause driving abnormal；When especially having the hiccups, directly
Connecing causes bootstrap capacitor electricity to be released, although controller have issued drive signal, but driving chip cannot be just
Often drive.
From the foregoing, in totem pole pfc circuit, the bootstrapping of flash pipe and low side pipe drives and adopts
Complement mode there is a problem of larger interference and reverse anchor jam nut, generate heat it is serious；Booted using single tube conducting
Type of drive, then when there is reversely input, flash pipe bootstrap capacitor is unable to maintain that voltage driven.
For this purpose, solving above-mentioned asking using light-coupled isolation driving or increase inductive current zero cross detection circuit more than industry
Topic, however, the way increased the complexity of cost and circuit.
Fig. 6 is dc-dc (DC-DC, Direct Current to Direct Current) two-stage topology
The schematic diagram that flash pipe and low side pipe drive.As shown in fig. 6, in DC-DC two-stage topology applications,
Prime synchronization BUCK circuits, when input voltage is low, flash pipe Q1 must be operated in pass-through state, non-
Complement mode, i.e., low side pipe Q2 is operated in normally off, and flash pipe Q1 is operated in normally open.But
It is, due to when low side pipe Q2 is normally closed flash pipe Q1 cannot can be caused to the charging bootstrap capacitor of flash
Cannot drive.It is existing to be also operated alone using optocoupler or transformator for the problems referred to above, but, this
To undoubtedly the complexity of cost and circuit be increased.
The content of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of high-low side bootstrapping drive control method and dress
Put, can solve the problem that some application places flash pipes and low side pipe drive cannot asking of driving of normal use bootstrapping
Topic, and avoid increasing the complexity of cost and circuit.
In order to reach above-mentioned technical purpose, the present invention provides a kind of high-low side bootstrapping drive control method, bag
Include：The circuit characteristic of detection flash pipe and low side pipe place circuit；When the circuit characteristic meets predetermined bar
During part, flash pipe is controlled according to preset strategy and low side pipe exports specific drive waveforms；Wherein, it is described
Preset strategy includes：Configuration flash pipe works in closed loop states, the pulse width modulation of flash pipe (PWM,
Pulse Width Modulation) drive waveforms dutycycle determines by circuit loop, with setting low side pipe work
In open loop situations, in a switch periods, in the first scheduled duration more late than the switch periods initial time
Moment turn on low side pipe, flash pipe open the moment before turn off low side pipe, or, in a switch
In cycle, low side pipe is turned on after the shut-off moment of flash pipe, more early than the switch periods finish time the
The moment of two scheduled durations turns off low side pipe, wherein, flash pipe is identical and same with the switch periods of low side pipe
Step.
Further, the preset strategy also includes：After at interval of N number of switch periods, in N+1
In individual switch periods, at the moment of the first scheduled duration more late than the switch periods initial time low side is turned on
Pipe, flash pipe open the moment before turn off low side pipe, or, in the N+1 switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
The long moment turns off low side pipe, wherein, N is the integer more than or equal to 0.
Further, the preset strategy also includes：In a switch periods, when opening of low side pipe
It is long to be less than or equal to the 10% of the switch periods duration.
Further, when in a switch periods, turning on low side pipe after the shut-off moment of flash pipe,
When low side pipe is turned off at the moment of the second scheduled duration more early than the switch periods finish time, the default plan
Slightly also include：In the switch periods, the maximum of flash pipe opens duration, when opening dead band of flash pipe
It is long, low while pipe open duration and it is low while when opening dead band duration sum and being equal to the switch periods of pipe
It is long.
Further, the predetermined condition includes：
The input voltage of flash pipe and low side pipe place circuit is less than threshold value；Or,
The input polarity of flash pipe and low side pipe place circuit is negative.
The present invention also provides a kind of high-low side bootstrapping drive dynamic control device, it is characterised in that include：Detection
Module, for detecting the circuit characteristic of flash pipe and low side pipe place circuit；Control module, for working as
When stating circuit characteristic and meeting predetermined condition, flash pipe is controlled according to preset strategy and the output of low side pipe is specific
Drive waveforms；Wherein, the preset strategy includes：Configuration flash pipe works in closed loop states, flash pipe
PWM drive waveforms dutycycles determined by circuit loop, work in open loop situations with side pipe is set low,
In one switch periods, at the moment of the first scheduled duration more late than the switch periods initial time low side is turned on
Pipe, flash pipe open the moment before turn off low side pipe, or, in a switch periods, in flash
Low side pipe is turned on after the shut-off moment of pipe, the second scheduled duration more early than the switch periods finish time when
The low side pipe of shut-off is carved, wherein, flash pipe is identical and synchronous with the switch periods of low side pipe.
Further, the preset strategy also includes：After at interval of N number of switch periods, in N+1
In individual switch periods, at the moment of the first scheduled duration more late than the switch periods initial time low side is turned on
Pipe, flash pipe open the moment before turn off low side pipe, or, in the N+1 switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
The long moment turns off low side pipe, wherein, N is the integer more than or equal to 0.
Further, the preset strategy also includes：In a switch periods, when opening of low side pipe
It is long to be less than or equal to the 10% of the switch periods duration.
Further, when in a switch periods, turning on low side pipe after the shut-off moment of flash pipe,
When low side pipe is turned off at the moment of the second scheduled duration more early than the switch periods finish time, the default plan
Slightly also include：In the switch periods, the maximum of flash pipe opens duration, when opening dead band of flash pipe
It is long, low while pipe open duration and it is low while when opening dead band duration sum and being equal to the switch periods of pipe
It is long.
Further, the predetermined condition includes：
The input voltage of flash pipe and low side pipe place circuit is less than threshold value；Or,
The input polarity of flash pipe and low side pipe place circuit is negative.
In the present invention, the circuit characteristic of flash pipe and low side pipe place circuit is detected；As circuit spy
During sexual satisfaction predetermined condition, flash pipe and the specific driving ripple of low side pipe output are controlled according to preset strategy
Shape；Wherein, the preset strategy includes：Configuration flash pipe works in closed loop states, the PWM of flash pipe
Drive waveforms dutycycle determines by circuit loop, and with side pipe is set low open loop situations are worked in, in a switch
In cycle, low side pipe is turned at the moment of the first scheduled duration more late than the switch periods initial time, in height
While pipe open the moment before turn off low while manage, or, in a switch periods, in the shut-off of flash pipe
Low side pipe is turned on after moment, it is low in the moment shut-off of the second scheduled duration more early than the switch periods finish time
Bian Guan, wherein, flash pipe is identical and synchronous with the switch periods of low side pipe.The invention provides simple,
Practical high-low side bootstrapping drive control method, fully applies the simplicity and number of Bootstrapping drive circuit
According to the motility of control.By the present invention, solve some application places flash pipes and low side pipe drives nothing
The problem that the bootstrapping of method normal use drives.Specifically, some application places are solved and adopts complement mode certainly
Lift drive exist interference and reverse anchor jam nut problem, solve again using single tube conducting bootstrapping type of drive without
Problem of the method to charging bootstrap capacitor.And, it is to avoid increase the complexity of cost and circuit.
Description of the drawings
Fig. 1 is the schematic diagram of totem pole non-bridge PFC circuits in prior art；
Fig. 2 is that complement mode drives and inductive current oscillogram；
Fig. 3 is the current direction schematic diagram of first stage S001；
Fig. 4 is the current direction schematic diagram of second stage S002；
Fig. 5 is the current direction schematic diagram of phase III S003；
Fig. 6 is the schematic diagram that DC-DC two-stage topology flash pipes and low side pipe drive；
Fig. 7 is the flow chart of high-low side bootstrapping drive control method provided in an embodiment of the present invention；
Fig. 8 is the flow chart of the high-low side bootstrapping drive control method that the embodiment of the present invention one is provided；
Fig. 9 drives logic timing figure one for the high-low side of the embodiment of the present invention one；
Figure 10 drives logic timing figure two for the high-low side of the embodiment of the present invention one；
Figure 11 drives logic timing figure one for the high-low side of the embodiment of the present invention two；
Figure 12 drives logic timing figure two for the high-low side of the embodiment of the present invention two.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, it will be appreciated that described below
Embodiment be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 7 is the flow chart of high-low side bootstrapping drive control method provided in an embodiment of the present invention.Such as Fig. 7
Shown, the high-low side bootstrapping drive control method that the present embodiment is provided is comprised the following steps：
Step 701：The circuit characteristic of detection flash pipe and low side pipe place circuit.
Specifically, the input voltage or input polarity of flash pipe and low side pipe place circuit are detected.
Step 702：When circuit characteristic meets predetermined condition, flash pipe and low is controlled according to preset strategy
Side pipe exports specific drive waveforms.
Wherein, the predetermined condition includes：
The input voltage of flash pipe and low side pipe place circuit is less than threshold value；Or,
The input polarity of flash pipe and low side pipe place circuit is negative.
Wherein, the preset strategy includes：Configuration flash pipe works in closed loop states, the PWM of flash pipe
Drive waveforms dutycycle determines by circuit loop, and with side pipe is set low open loop situations are worked in, in a switch
In cycle, low side pipe is turned at the moment of the first scheduled duration more late than the switch periods initial time, in height
While pipe open the moment before turn off low while manage, or, in a switch periods, in the shut-off of flash pipe
Low side pipe is turned on after moment, it is low in the moment shut-off of the second scheduled duration more early than the switch periods finish time
Bian Guan, wherein, flash pipe is identical and synchronous with the switch periods of low side pipe.
Wherein, the first scheduled duration can be equal or different with the second scheduled duration, and both concrete values can
It is configured as needed.The present invention is not limited this.
Further, the preset strategy also includes：After at interval of N number of switch periods, in N+1
In individual switch periods, at the moment of the first scheduled duration more late than the switch periods initial time low side is turned on
Pipe, flash pipe open the moment before turn off low side pipe, or, in the N+1 switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
The long moment turns off low side pipe, wherein, N is the integer more than or equal to 0.
Specifically, when N is 0, i.e., in each switch periods, when than switch periods starting
The moment for carving late first scheduled duration turns on low side pipe, flash pipe open the moment before turn off low side pipe,
Or, low side pipe is turned on after the shut-off moment of flash pipe, it is pre- more early than switch periods finish time second
The timing long moment turns off low side pipe.When N is non-zero integer, by taking N=2 as an example, open at first
In the cycle of pass, low side pipe is turned at the moment of the first scheduled duration more late than the switch periods initial time,
Flash pipe open the moment before turn off low side pipe, or, low side pipe is turned on after the shut-off moment of flash pipe,
Low side pipe is turned off at the moment of the second scheduled duration more early than the switch periods finish time；Open for 2 at interval
After the cycle of pass, in the 3rd switch periods, in the more late than the switch periods initial time first pre- timing
Long moment turns on low side pipe, flash pipe open the moment before turn off low side pipe, or, in flash pipe
The shut-off moment after turn on low side pipe, in the second scheduled duration more early than the switch periods finish time
Turn off low side pipe.Afterwards, at interval of 2 switch periods, with first switch cycle and the 3rd switch week
Setting in phase is identical.
Further, the preset strategy also includes：In a switch periods, when opening of low side pipe
It is long to be less than or equal to the 10% of the switch periods duration.
Further, when in a switch periods, turning on low side pipe after the shut-off moment of flash pipe,
When low side pipe is turned off at the moment of the second scheduled duration more early than the switch periods finish time, the default plan
Slightly also include：In the switch periods, the maximum of flash pipe opens duration, when opening dead band of flash pipe
It is long, low while pipe open duration and it is low while when opening dead band duration sum and being equal to the switch periods of pipe
It is long.
It should be noted that high-low side bootstrapping drive control method provided in an embodiment of the present invention can be applied
In all circuit topology high-low sides bootstrapping drive, and the type of flash pipe and low side pipe for example include metal-
Oxidc-Semiconductor (MOS, Metal-Oxide-Semiconductor) field-effect transistor, gallium nitride
(GaN), insulated gate bipolar transistor (IBGT, Insulated Gate Bipolar Transistor)
Deng switching tube.However, the present invention is not limited this.
Followed by specific embodiment, the present invention will be described.
Embodiment one
Fig. 8 is the flow chart of the high-low side bootstrapping drive control method that the embodiment of the present invention one is provided.This reality
Apply example to be applied in the main topological structure of totem pole non-bridge PFC as shown in Figure 1, what the present embodiment was provided
High-low side bootstrapping drive control method is comprised the following steps：
Step 801：The input voltage type and input polarity of detection circuit.
Step 802：According to input voltage type and input polarity, configuration PWM drives.
Specifically, when input AC, configuration supervisor works in switching mode (such as flash pipe), auxiliary
Pipe (such as low side pipe) is in " shut " mode", to avoid complementary bootstrapping from driving the interference and loss for producing；When
During input forward dc, with side pipe is set low in switching mode, flash pipe is in all the time " shut " mode", with
Complementary bootstrapping is avoided to drive the interference and loss for producing；When reverse direct current is input into, the pipe work of configuration flash
In master switch pattern, low side pipe works in auxiliary switch pattern, the low side pipe in auxiliary switch pattern it is open-minded
Time is fixed and short, and to solve single tube bootstrapping, to drive the flash pipe that causes to drive abnormal, and avoid it is complementary from
Lift and drive the interference and loss for producing.
For example, in the main topological structure of totem pole non-bridge PFC as shown in Figure 1, when input pole
Property for it is negative when, i.e. VL<VN, flash pipe Q1 work in closed loop states, the drive waveforms of low side pipe
(PWML) with the drive waveforms (PWMH) of flash pipe as shown in fig. 9 or 10.
As shown in figure 9, flash pipe and low side pipe setting same switch cycle, and synchronously；Switch periods are led to
Cross enumerator (Counter) to successively decrease timing；Flash pipe is configured to wave filter close-loop driven output mode,
Export PWM waveform dutycycle (Duty) and determined that low side pipe is operated in open loop situations by PFC loops,
It is opened the moment and is determined by Counter#3, and the shut-off moment is determined by Counter#4.Flash pipe is at each
Export when switch periods start, dutycycle is by loop control；Opening for low side pipe is later than flash pipe constantly
At the shut-off moment, in this, open moment Counter#3 of the low side pipe in each switch periods near end is opened
It is logical, Counter4# shut-offs are carved when off, duration t1=Counter#4-Counter#3 are opened, in this,
The shut-off moment is, for example, the finish time of switch periods, i.e. the second scheduled duration is 0.Wherein, tl is general
It is less, it is nanosecond (ns) rank.Low side pipe opens duration e.g., less than or equal to switch week
The 10% of phase.Now, the charging to flash pipe bootstrap capacitor is completed.In addition, in order to prevent flash pipe and
Low side pipe intercommunication, must limit flash pipe maximum duty cycle, it is ensured that flash pipe maximum open duration th_max,
Flash pipe open dead band duration tdh, it is low while pipe open duration tl and it is low while pipe open dead band duration tdl
And value be equal to a switch periods duration, i.e. mono- switch periods duration of th_max+tdh+t1+tdl=
Period。
As shown in Figure 10, low side pipe and flash pipe setting same switch cycle, and synchronously；Switch week
Phase is successively decreased timing by enumerator (Counter)；Flash pipe is configured to wave filter close-loop driven output mould
Formula, open the moment is determined by Counter#1, and output PWM waveform dutycycle is determined by PFC loops；
Low side pipe is operated in open loop situations, and it is opened the moment and is determined by Counter#3, the shut-off moment by
Counter#4 is determined.In this, low side pipe opens moment Counter#3 in each switch periods beginning
It is open-minded, Counter#4 shut-offs are carved when off, open duration t1=Counter#4-Counter#3.Its
In, tl is typically small, is ns ranks.Low side pipe open duration e.g., less than or equal to this open
The 10% of pass cycle.Now, the charging to flash pipe bootstrap capacitor is completed.Flash pipe is also switched at each
The fixed time Counter#1 in cycle is open-minded.In addition, in order to prevent flash pipe and low side pipe intercommunication,
The value of Counter#1, Counter#3 and Counter#4 must be limited, to ensure Counter#1
>Counter#4>Counter#3.Wherein, open dead band duration tdl not knowing, its minima tdl_min
The initial time of=Counter#3- current switch periods, opens dead band duration tdh=Counter#1
–Counter#4。
Embodiment two
The present embodiment is applied to the prime synchronous rectification of two-stage DC-DC topological structure as shown in Figure 6
Buck circuits.In the present embodiment, when it is greater than or equal to a threshold value to detect input voltage, produce mutual
The flash pipe of benefit and low side pipe drive waveforms；When input voltage is less than a threshold value, the driving ripple of flash pipe
The drive waveforms (PWML) of shape (PWMH) and low side pipe are as seen in figures 11 or 12.
As shown in figure 11, flash pipe and low side pipe setting same switch cycle, and synchronously；Switch periods
Successively decreased timing by enumerator (Counter)；Flash pipe continuously generates the full dutycycle ripple in N number of cycle
After shape, in the N+1 switch periods, low side pipe the section start of the switch periods first open it is fixed compared with
Little duty cycle, to flash pipe charging bootstrap capacitor, to supplement the electricity lost when flash pipe drives,
After the shut-off moment of low side pipe, the dutycycle of flash pipe is opened in remaining time.Wherein, N is big
In or integer equal to 0.Wherein, low side pipe opens duration e.g., less than or equal to switch periods
10%.
As shown in figure 12, flash pipe and low side pipe setting same switch cycle, and synchronously；Switch periods
Determined by enumerator (Counter) countdown；Flash pipe continuously generates the full duty in N number of cycle
After than waveform, in the N+1 switch periods, first open certain flash compared with big space rate and drive,
After the shut-off moment of flash pipe, again low side is opened with less fixed duty cycle in current period and managed, it is complete
The charging of flash pipe bootstrap capacitor in pairs.Wherein, N is the integer more than or equal to 0.Wherein, low side
Pipe opens the 10% of the duration e.g., less than or equal to switch periods.
In the present embodiment, in order to prevent flash pipe straight-through with low side pipe, Dead Time must be all set.
Additionally, the embodiment of the present invention also provides a kind of high-low side bootstrapping drive dynamic control device, including：Detection
Module, for detecting the circuit characteristic of flash pipe and low side pipe place circuit；Control module, for working as
When stating circuit characteristic and meeting predetermined condition, flash pipe is controlled according to preset strategy and the output of low side pipe is specific
Drive waveforms；Wherein, the preset strategy includes：Configuration flash pipe works in closed loop states, flash pipe
PWM drive waveforms dutycycles determined by circuit loop, work in open loop situations with side pipe is set low,
In one switch periods, at the moment of the first scheduled duration more late than the switch periods initial time low side is turned on
Pipe, flash pipe open the moment before turn off low side pipe, or, in a switch periods, in flash
Low side pipe is turned on after the shut-off moment of pipe, the second scheduled duration more early than the switch periods finish time when
The low side pipe of shut-off is carved, wherein, flash pipe is identical and synchronous with the switch periods of low side pipe.
Further, the preset strategy also includes：After at interval of N number of switch periods, in N+1
In individual switch periods, at the moment of the first scheduled duration more late than the switch periods initial time low side is turned on
Pipe, flash pipe open the moment before turn off low side pipe, or, in the N+1 switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
The long moment turns off low side pipe, wherein, N is the integer more than or equal to 0.
Further, the preset strategy also includes：In a switch periods, when opening of low side pipe
It is long to be less than or equal to the 10% of the switch periods duration.
Further, when in a switch periods, turning on low side pipe after the shut-off moment of flash pipe,
When low side pipe is turned off at the moment of the second scheduled duration more early than the switch periods finish time, the default plan
Slightly also include：In the switch periods, the maximum of flash pipe opens duration, when opening dead band of flash pipe
It is long, low while pipe open duration and it is low while when opening dead band duration sum and being equal to the switch periods of pipe
It is long.
Further, the detection module, specifically for detecting the defeated of flash pipe and low side pipe place circuit
Enter voltage or input polarity.
Further, the predetermined condition includes：
The input voltage of flash pipe and low side pipe place circuit is less than threshold value；Or,
The input polarity of flash pipe and low side pipe place circuit is negative.
In practical application, the function of above-mentioned module stores program in memory by computing device
/ instruction is realized.However, the present invention is not limited this.The function of above-mentioned module can also by firmware/
Logic circuit/integrated circuit is realized.
Additionally, with regard to described device concrete handling process with described in said method, therefore repeat no more in this.
In sum, hardware of the invention adopts average expert drive integrated circult (IC, Integrated
Circuit) chip, drive waveforms sequential had both solved certain by control device (such as microprocessor) realization
A little application places are booted using complement mode and drive interference, the reverse anchor jam nut problem for occurring, and are solved again and are adopted
When being driven with the conducting bootstrapping of flash single tube, there is a problem of cannot be to charging bootstrap capacitor.And, it is to avoid
Increase cost and circuit complexity.
The ultimate principle and principal character and advantages of the present invention of the present invention has been shown and described above.This
It is bright to be not restricted to the described embodiments, simply illustrate the present invention described in above-described embodiment and description
Principle, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications,
These changes and improvements are both fallen within scope of the claimed invention.
Claims (10)
1. a kind of high-low side is booted drive control method, it is characterised in that included：
The circuit characteristic of detection flash pipe and low side pipe place circuit；
When the circuit characteristic meets predetermined condition, flash pipe is controlled according to preset strategy and low side pipe is defeated
Go out specific drive waveforms；
Wherein, the preset strategy includes：Configuration flash pipe works in closed loop states, the pulse of flash pipe
Width modulated PWM drive waveforms dutycycle determines by circuit loop, and with side pipe is set low open loop shape is worked in
State, in a switch periods, leads at the moment of the first scheduled duration more late than the switch periods initial time
Logical low side pipe, flash pipe open the moment before turn off low side pipe, or, in a switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
The long moment turns off low side pipe, wherein, flash pipe is identical and synchronous with the switch periods of low side pipe.
2. the method for claim 1, it is characterised in that the preset strategy also includes：Often
After being spaced N number of switch periods, in the N+1 switch periods, when than the switch periods starting
The moment for carving late first scheduled duration turns on low side pipe, flash pipe open the moment before turn off low side pipe,
Or, in the N+1 switch periods, low side pipe is turned on after the shut-off moment of flash pipe, than
The moment of switch periods finish time early second scheduled duration turns off low side pipe, wherein, N be more than or
Integer equal to 0.
3. method as claimed in claim 1 or 2, it is characterised in that the preset strategy also includes：
In a switch periods, low side pipe open duration less than or equal to the switch periods duration 10%.
4. method as claimed in claim 1 or 2, it is characterised in that when in a switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
When the long moment turns off low side pipe, the preset strategy also includes：In the switch periods, flash pipe
Maximum open duration, flash pipe open dead band duration, it is low while pipe open duration and it is low while pipe open
Logical dead band duration sum is equal to the switch periods duration.
5. the method for claim 1, it is characterised in that the predetermined condition includes：
The input voltage of flash pipe and low side pipe place circuit is less than threshold value；Or,
The input polarity of flash pipe and low side pipe place circuit is negative.
6. a kind of high-low side is booted drive dynamic control device, it is characterised in that included：
Detection module, for detecting the circuit characteristic of flash pipe and low side pipe place circuit；
Control module is high according to preset strategy control for when the circuit characteristic meets predetermined condition
In Guan Jidi, pipe exports specific drive waveforms；
Wherein, the preset strategy includes：Configuration flash pipe works in closed loop states, the PWM of flash pipe
Drive waveforms dutycycle determines by circuit loop, and with side pipe is set low open loop situations are worked in, in a switch
In cycle, low side pipe is turned at the moment of the first scheduled duration more late than the switch periods initial time, in height
While pipe open the moment before turn off low while manage, or, in a switch periods, in the shut-off of flash pipe
Low side pipe is turned on after moment, it is low in the moment shut-off of the second scheduled duration more early than the switch periods finish time
Bian Guan, wherein, flash pipe is identical and synchronous with the switch periods of low side pipe.
7. device as claimed in claim 6, it is characterised in that the preset strategy also includes：Often
After being spaced N number of switch periods, in the N+1 switch periods, when than the switch periods starting
The moment for carving late first scheduled duration turns on low side pipe, flash pipe open the moment before turn off low side pipe,
Or, in the N+1 switch periods, low side pipe is turned on after the shut-off moment of flash pipe, than
The moment of switch periods finish time early second scheduled duration turns off low side pipe, wherein, N be more than or
Integer equal to 0.
8. device as claimed in claims 6 or 7, it is characterised in that the preset strategy also includes：
In a switch periods, low side pipe open duration less than or equal to the switch periods duration 10%.
9. device as claimed in claims 6 or 7, it is characterised in that when in a switch periods,
Low side pipe is turned on after the shut-off moment of flash pipe, in the more early than the switch periods finish time second pre- timing
When the long moment turns off low side pipe, the preset strategy also includes：In the switch periods, flash pipe
Maximum open duration, flash pipe open dead band duration, it is low while pipe open duration and it is low while pipe open
Logical dead band duration sum is equal to the switch periods duration.
10. device as claimed in claim 6, it is characterised in that the predetermined condition includes：
The input voltage of flash pipe and low side pipe place circuit is less than threshold value；Or,
The input polarity of flash pipe and low side pipe place circuit is negative.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510678967.XA CN106602900A (en) | 2015-10-19 | 2015-10-19 | High-low-side bootstrapped drive control method and apparatus |
| PCT/CN2016/076502 WO2016177118A1 (en) | 2015-10-19 | 2016-03-16 | High and low side bootstrap driving control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510678967.XA CN106602900A (en) | 2015-10-19 | 2015-10-19 | High-low-side bootstrapped drive control method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106602900A true CN106602900A (en) | 2017-04-26 |
Family
ID=57218028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510678967.XA Pending CN106602900A (en) | 2015-10-19 | 2015-10-19 | High-low-side bootstrapped drive control method and apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106602900A (en) |
| WO (1) | WO2016177118A1 (en) |
Cited By (4)
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| CN108736702A (en) * | 2018-06-08 | 2018-11-02 | 邯郸美的制冷设备有限公司 | Totem non-bridge PFC circuits, power supply change-over device and air conditioner |
| CN113752838A (en) * | 2020-05-29 | 2021-12-07 | 宁德时代新能源科技股份有限公司 | Driving circuit |
| WO2022227417A1 (en) * | 2021-04-25 | 2022-11-03 | 华为数字能源技术有限公司 | Control system and method for totem-pole power factor correction circuit, and power adapter |
| US11949328B2 (en) | 2019-01-28 | 2024-04-02 | Murata Manufacturing Co., Ltd. | Bootstrap pre-charge circuit in totem-pole power factor correction converter |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2016177118A1 (en) | 2016-11-10 |
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Application publication date: 20170426 |